A sealed container initially holds two types of particle. One type is made of two X atoms joined together, and the other type is made of two Y atoms joined together. After the container is heated, it contains only particles in which one X atom is joined to one Y atom.
Explain whether heating the container causes a physical change or a chemical change. Use the descriptions of the particles before and after heating in your answer.
93 exam-style questions on OCR GCSE Chemistry 1.1 The particle model, covering 1.1.1 The particle model and changes of state and 1.1.2 Limitations of the particle model. Each one has a worked solution and a mark scheme showing where the marks go.